Feature:1. Manufacturing Material: Made of high quality rubber and nylon materials, lightweight, strong and durable, which can be used for a long time.2. Applicability: Female end joint, suitable for most second stage head thread connections, tight and not falling off. Male end thread is suitable for all first stage head low pressure interfaces.3. Nylon Safety Knitting Design: Exterior nylon safety knitting design to resist obstacles and wear, corrosion and aging resistant.4. Diverse Features: 500PSI working pressure, 74cm / 29.1in length, suitable for second stage regulator. Its purpose is to connect first stage head and second stage head rebreather.5. Simple Operation: Simple to operate, easy to use, easy to install and disassemble. Without any difficult requirements even though you use it for the first time.Specification:Item Type: Low Pressure Regulator HoseWeight: Approx.145g / 5.1ozMaterial: Rubber + Nylon + BrassPurpose: Connect First Stage Head And Second Stage Head RebreatherLength: Approx.74cm / 29.1inColor: Black.Package List:1 x Hose